Abstracts Brochure - CERN

TUPLS120
TUPLS121
TUPLS122
27-Jun-06 16:00 - 18:00 TUPLS — Poster Session
Laser Technology for Filling ITEP-TWAC Synchrotron Rings
One of the key systems of the ITEP-TWAC ac-
B.Y. Sharkov, A. Balabaev, A.M. Kozodaev, A. Shumshurov (ITEP) celerator/accumulator facility of Moscow’s
Institute for Theoretical and Experimental
Physics (ITEP) is the laser ion source (LIS). Its implementation in accelerator scheme gives possibility to employ
the Non-Liouvillian stripping injection process from the booster ring into the accumulator ring. The ion source, based
on 5J/0.5 Hz TEA CO2-laser is being in operation provides 20 mA/10 µs carbon ion beam to the 2 MV/2.5 MHz preinjector.
As a result the ITEP-TWAC facility delivers the ion beams in two operation modes : - in ion acceleration
mode supplying and up to 109 4.3 GeV/u carbon C 6+ ions per second; - in ion accumulation mode ∼2 1010 300MeV/
u carbon C 6+ ions per 170 ns pulse; The development of intermediate version of the LIS based on 10J/0.5 Hz CO2laser
opens opportunity for generation of intense bunches of heavy ions with atomic mass up to A ∼ 40 by the end of
2006. Assembling of the powerful CO2-laser with 100 J/20 ns output at 1 Hz is in progress to be set in operation by
the end of 2007.
A Comparison of Simulated and Measured Emittance of Ion Beams Extracted from 2.45
GHz Permanent Magnet ECR Ion Source
The emittance studies of the 2.45 GHz per-
A. Zelenak (Biont, a.s.) S.L. Bogomolov (JINR)
manent magnet ECR ion source were done
at the FLNR, JINR, Dubna*. It was found
strong emittance dependence on the operating mode of the ECR ion source, on the different configuration of the
extraction system and on the shape of plasma electrode. The new additional emittance studies have been done for
2.45 GHz permanent magnet ECR ion source and they are presented in this article. The comparisons of additional
emittance simulations with the emittance measurements for the ECR ion source are presented. There were found
the optimal input parameters for the program IGUN. A discussion about a computer simulation and emittance
measurements is included.
*A. Zelenak et al. Emittance studies of the 2.45 GHz permanent magnet ECR ion source, Rev. Sci. Instrum., Vol. 75,
No. 5, May 2004.
Implementation of the Proposed Multiturn Extraction at the CERN Proton Synchrotron
Following the positive results of the three-
M. Giovannozzi (CERN)
year measurement campaign at the CERN
Proton Synchrotron concerning beam splitting
with stable islands in the transverse phase space, the study of a possible implementation of the proposed multiturn
extraction was undertaken. The novel approach would allow a substantial reduction of beam losses, with respect
to the present scheme, when delivering the high-intensity proton beams required for the planned CERN Neutrino
to Gran Sasso Project. Major modifications to the ring layout are foreseen, such as a new design of the extraction
bumps including also the installation of three additional kickers to create a closed-bump over the five turns used to
extract the split beam. The ring aperture was reviewed and improvements are proposed to reduce possible beam
losses between beam splitting and extraction. The goal consists of implementing the proposed changes by the end of
the 2007/2008 PS shutdown and to commission the novel extraction during the 2008 physics run.
256